实现一个简单的websocket
码农天地 -
实现简单的websocket，只需要几步：
引入socket.io组件;前端初始化页面时，监听socket.on('chatMsg', () => xxx);需要发送事件时，触发socket.emit('chatMsg', 'msg');后端监听事件并回调即可index.html<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div id="app">
<input type="text" id="name">
<button type="button" @click="submit">send</button>
<ul v-for="(item, i) in msgList" :key="item + new Date().getTime()">
<li>{{i+1}}.{{item}}</li>
</ul>
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.0/axios.js"></script>
<script src="https://lib.baomitu.com/vue/2.6.12/vue.js"></script>
<script src="https://lib.baomitu.com/socket.io/3.0.1/socket.io.js"></script>
<script>
// 生成对象
let socket = io();
let vm = new Vue({
el: '#app',
data: {
msgList: [],
},
created () {
// 监听
socket.on('chatMsg', (msg) => {
vm.msgList.push(msg)
})
},
methods: {
submit: async () => {
let msg = document.getElementById('name').value;
document.getElementById('name').value = '';
// 发送事件
socket.emit('chatMsg', msg);
},
}
})
</script>
</body>
</html>
const express = require('express');
const app = express();
const http = require('http').Server(app);
const io = require('socket.io')(http);
app.get('/', (req, res) => {
res.sendFile(__dirname + '/index.html');
})
// 监听
io.on('connection', (socket) => {
console.log('a socket connection....');
// 事件到达时
socket.on('chatMsg', (msg) => {
io.emit('chatMsg', msg);
})
// 链接断开时
socket.on('disconnect', () => {
console.log('disconnect');
})
})
http.listen(3000, () => {
console.log('http listen 3000............');
})
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